<!DOCTYPE html>

<html>
    <head>
        <title>Hello World</title>
        <script src="jquery-3.1.0.min.js">
            
        </script>
        <script src="popup.js">
            
        </script>
    </head>
    <body>
        <h2 id="greet">Hello World!</h2>
        <input id="name" type="text"/>
    </body>
</html>